import Vue from 'vue'
import VueRouter from 'vue-router'
// import Home from '../views/Home.vue'
// import Login from '../components/Login.vue'

Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    redirect: '/login'
  },
  {
    path: '/login',
    name: 'Login',
    component: () => import('../components/Login.vue')
  },
  {
    path: '/home',
    name: 'Home',
    component: () => import('../components/Home.vue'),
    redirect: '/welcome',
    children: [
      {
        path: '/welcome',
        name: 'Welcome',
        component: () => import('../components/Welcome.vue')
      },
      {
        path: '/users',
        name: 'Users',
        component: () => import('../components/user/Users.vue')
      }
    ]
  }
  // {
  //   path: '/',
  //   name: 'Home',
  //   component: Home
  // },
  // {
  //   path: '/about',
  //   name: 'About',
  //   // route level code-splitting
  //   // this generates a separate chunk (about.[hash].js) for this route
  //   // which is lazy-loaded when the route is visited.
  //   component: () => import(/* webpackChunkName: "about" */ '../views/About.vue')
  // }
]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫  访问权限
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next() 是一个函数 表示方行
  // next() 方行  next('/login) 强制跳转
  if(to.path === '/login') return next();
  //获取token
  const tokenStr = window.sessionStorage.getItem('token');
  if(!tokenStr) return next('/login');
  next();
})

export default router
